Leybold Systems Gmbh

Dieter Br&uuml;ss

Joachim Aufreiter

Klaus Kalkowski

Burkhard Altekr&uuml;ger

A device and process for the determination of the diameters of a crystal that is pulled from a liquified material. In this connection several video cameras are provided, each of which reproduces its own section along the vertical axis of the crystal or in a direction vertical to it. The image angles of the camera are laid out in such a way that the object to be reproduced completely fills the entire picture plane&mdash;at least in one direction. For objects with a small diameter; e.g., the crystal neck, a camera with a small image angle is used, while for objects with a large diameter; e.g., the crystal body, a camera with a large image angle is used.

Device and method for the determination of diameters of crystals

A device for monitoring a melt for the production of crystals. A camera is provided which images at least portions of the surface of the contents of a crucible. An evaluating device is used to evaluate the camera's images with respect to solid and liquid portions of the surface of the crucible contents.

Growing community of inventors

Bruchköbel, Germany

Dieter Brüss

Growing community of inventors

Bruchköbel, Germany

Dieter Br&uuml;ss

Dieter Brüss